@malexmoore Similar and more commonly associated with US Police forces DUI tests. This video by @EssexPoliceUK and @EPRoadsPolicing explains the test. youtu.be/tf0yQJxP5k8 Post navigation #Roadworks #M27 westbound closed from junct 11 #Wallington to junct 9 #ParkGate until 06:00 tomorrow morning. Diversion is via #A27. @malexmoore Yes Field Impairment Test, FIT. Actual full name is Drugs recognition Field Impairment Test or DRFIT.